[INFO] cloning repository https://github.com/ityy/rust_study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ityy/rust_study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8756fd6eb7d1122c156c85e59aef75e8d4cbf3f
[INFO] checking ityy/rust_study against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fityy%2Frust_study" "/workspace/builds/worker-74/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-74/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ityy/rust_study on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ityy/rust_study
[INFO] finished tweaking git repo https://github.com/ityy/rust_study
[INFO] tweaked toml for git repo https://github.com/ityy/rust_study written to /workspace/builds/worker-74/source/Cargo.toml
[INFO] crate git repo https://github.com/ityy/rust_study already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91fdd7b1874c2b4dc9b3b5109fce7e4ca0f8ea5ac831b6fe92bedce4698ef3ed
[INFO] running `Command { std: "docker" "start" "-a" "91fdd7b1874c2b4dc9b3b5109fce7e4ca0f8ea5ac831b6fe92bedce4698ef3ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91fdd7b1874c2b4dc9b3b5109fce7e4ca0f8ea5ac831b6fe92bedce4698ef3ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91fdd7b1874c2b4dc9b3b5109fce7e4ca0f8ea5ac831b6fe92bedce4698ef3ed", kill_on_drop: false }`
[INFO] [stdout] 91fdd7b1874c2b4dc9b3b5109fce7e4ca0f8ea5ac831b6fe92bedce4698ef3ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-74/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16d8f0fd24c07b202b14de30f19779a45f374c9bc1a9bd900a443e7b0754da7f
[INFO] running `Command { std: "docker" "start" "-a" "16d8f0fd24c07b202b14de30f19779a45f374c9bc1a9bd900a443e7b0754da7f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling cc v1.0.38
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking pin-project-lite v0.1.1
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[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
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[INFO] [stderr]     Checking bytes v0.5.3
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking arc-swap v0.4.4
[INFO] [stderr]     Checking smallvec v1.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.15
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]    Compiling encoding_rs v0.8.17
[INFO] [stderr]     Checking adler32 v1.0.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling openssl v0.10.26
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking copyless v0.1.4
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling ucd-trie v0.1.2
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking unic-char-range v0.7.0
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking unic-common v0.7.0
[INFO] [stderr]    Compiling libloading v0.6.2
[INFO] [stderr]     Checking safemem v0.3.1
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking deunicode v0.4.3
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]     Checking once_cell v1.2.0
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking byteorder v0.3.13
[INFO] [stderr]     Checking humansize v1.1.0
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking route-recognizer v0.1.13
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]     Checking dylib_1 v0.1.0 (/opt/rustwide/workdir/src/dylib_study/t01_libloading_test/dylib_1)
[INFO] [stderr]     Checking rust_study v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling unicase v2.4.0
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking lazy_static_test v0.1.0 (/opt/rustwide/workdir/src/lazy_static_test)
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/dylib_study/t01_libloading_test/dylib_1/src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/dylib_study/t01_libloading_test/dylib_1/src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `str`, which is not FFI-safe
[INFO] [stdout]   --> src/dylib_study/t01_libloading_test/dylib_1/src/lib.rs:15:48
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern fn have_args_no_return(p1: u32, p2: &str) {
[INFO] [stdout]    |                                                ^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider using `*const u8` and a length instead
[INFO] [stdout]    = note: string slices have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `for<'r> fn(&'r str)`, which is not FFI-safe
[INFO] [stdout]   --> src/dylib_study/t01_libloading_test/dylib_1/src/lib.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern fn callback_test(func: fn(&str)) -> u32 {
[INFO] [stdout]    |                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]    = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name futures /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-0.1.29/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="use_std"' --cfg 'feature="with-deprecated"' -C metadata=5d1e0d8fbfc49916 -C extra-filename=-5d1e0d8fbfc49916 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: `extern` fn uses type `str`, which is not FFI-safe
[INFO] [stdout]   --> src/dylib_study/t01_libloading_test/dylib_1/src/lib.rs:15:48
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub extern fn have_args_no_return(p1: u32, p2: &str) {
[INFO] [stdout]    |                                                ^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout]    = help: consider using `*const u8` and a length instead
[INFO] [stdout]    = note: string slices have no C equivalent
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `for<'r> fn(&'r str)`, which is not FFI-safe
[INFO] [stdout]   --> src/dylib_study/t01_libloading_test/dylib_1/src/lib.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub extern fn callback_test(func: fn(&str)) -> u32 {
[INFO] [stdout]    |                                   ^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using an `extern fn(...) -> ...` function pointer instead
[INFO] [stdout]    = note: this function pointer has Rust-specific calling convention
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "16d8f0fd24c07b202b14de30f19779a45f374c9bc1a9bd900a443e7b0754da7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16d8f0fd24c07b202b14de30f19779a45f374c9bc1a9bd900a443e7b0754da7f", kill_on_drop: false }`
[INFO] [stdout] 16d8f0fd24c07b202b14de30f19779a45f374c9bc1a9bd900a443e7b0754da7f